MDN&reg; 3D 10W High-Definition Bluetooth Speaker (Two Large 50MM 5W Drivers), 10 hour Play-time with Built-in Speakerphone For iPhone 5S, 5, iPad Air, Mini, Samsung Galaxy S5, S4, HTC, Tablets, PC - Silver Bluetooth version 4.0, provides optimal wireless sound quality. 3D Digital Signal Processing chip on the PCB boards to make sound much be better Built-in A grade rechargeable lithium-ion battery, 2200mAh lasts up to 12 - 15 hours Full Aluminium and stainless steel construction, metal grille..ect. All give the impression of good craftsmanship 12 Months Warranty Shop with confidence... Shop with MDN